Miracle on 34th street (1947)
This movie was ironically shown in May of 1947 as head of Fox studios Daryl F. Zanuck reasoned that more people went to the movies in the summer.
In fact, the trailer did everything it could to hide the fact that it was a Christmas movie. It was directed by George Seaton and starred Edmund Gwenn, Maureen O'Hara, John Payne and a very young Natalie Wood.
The movie was indeed a showcase for Macy's department store as well as Gimble's. The backdrop for the movie was the annual Macy's Thanksgiving Day parade which had just come off of hiatus during WWII.